SSD1858 Solomon Systech, SSD1858 Datasheet - Page 14

• Manufacturer Part Number: SSD1858
• Description: LCD Segment / Common Driver
• Manufacturer: Solomon Systech

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6
9
SSD1858
according to the following table.
low.
This input pin is to identify display data/command cycle. When the pin is high, the data written to the
driver will be written into display RAM. When the pin is low, the data will be interpreted as command.
This pin is microprocessor interface signal. When interfacing to an 6800-series microprocessor, the
signal indicates read mode when high and write mode when low. When interfacing to an 8080-
microprocessor, a data write operation is initiated when R/W(WR#) is low and the chip is selected.
This pin is microprocessor interface signal. When interfacing to an 6800-series microprocessor, a data
operation is initiated when E(RD#) is high and the chip is selected. When interfacing to an 8080-
microprocessor, a data read operation is initiated when E(RD#) is low and the chip is selected.
These pins are 8-bit bi-directional data bus to be connected to the microprocessor’s data bus. When
serial mode is selected, D
6.1
This pin is reset signal input. When the pin is low, initialization of the chip is executed.
6.2
This pin uses together with PS1 to determine the interface protocol between the driver and MCU.
Refer to PS1 pin descriptions for more details.
6.3
This pin uses together with PS0 to determine the interface protocol between the driver and MCU
6.4
This pin is chip select input. The chip is enabled for display data/command transfer only when CS# is
6.5
6.6
6.7
6.8
6.9
Power supply pin.
PS0
L
L
H
H
Table 3 - PS0 & PS1 Interface
PIN DESCRIPTION
RES#
PS0
PS1
CS#
D/C#
R/W(WR#)
E(RD#)
D
V
DD
0
-D
PS1
L
H
L
H
7
Rev 1.1
09/2002
Interface
3-wire SPI (write only)
4-wire SPI (write only)
8080 parallel interface (read and write allowed)
6800 parallel interface (read and write allowed)
7
is the serial data input SDA and D
6
is the serial clock input SCK.
SOLOMON